US Bridges

Mill Creek over CR-311

Good

Shelby County, Alabama · 0.43 Mi. North Al 145 · Structure no. 021017

Built
2017
8 years old
Condition
Good
inspected July 2023
Type
Truss - Thru
Steel
Length
70 ft
1 main span
Daily traffic
177
2023 count
Owner
County
County Highway Agency

About this bridge

Mill Creek over CR-311 is a steel truss - thru carrying Mill Creek over CR-311 in Shelby County, Alabama. It was built in 2017, so it is 8 years old, younger than the Alabama average of 51.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 177 vehicles a day, roughly 17% of them trucks, projected to reach 263 by 2043. The structure is 70 ft (21.3 m) long and 28 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesMill Creek
CrossesCR-311
Location0.43 Mi. North Al 145
RouteCounty Highway 311
CountyShelby County
StateAlabama
Coordinates33.05228, -86.5799
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.1 US tons
Inventory rating22.3 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length70 ft (21.3 m)
Longest span66 ft (20 m)
Deck width28 ft (8.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deck0 ft (0 m)

Traffic and service

Average daily traffic177 (2023)
Projected traffic263 by 2043
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$594,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Mill Creek over CR-311 built?

It was built in 2017, making it 8 years old in 2025.

What condition is Mill Creek over CR-311 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2023.

How much traffic does Mill Creek over CR-311 carry?

About 177 vehicles per day (2023 count), of which roughly 17% are trucks.

How long is Mill Creek over CR-311?

The structure is 70 ft (21.3 m) long with a longest span of 66 ft (20 m) and a deck 28 ft wide.

Who owns Mill Creek over CR-311?

It is owned by the County Highway Agency.